package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class ReportServiceImpl implements ReportService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 统计指定区间内的营业额
     * @param begin
     * @param end
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> detelist = new ArrayList();
        //用于存放从begin到end范围内的每天日期

        detelist.add(begin);

        while(!begin.equals(end)){
            //日期计算，计算指定日期的后一天
            begin=begin.plusDays(1);
            detelist.add(begin);
        }
        //用于存放营业额
        List<Double> doubleList = new ArrayList<>();


        for (LocalDate localDate : detelist) {
            //查询date日期对应的营业额数据，营业额是指状态为已完成的订单金额合计
            //date 年月日  0:0:0 23:59:59
            LocalDateTime begintime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endtime = LocalDateTime.of(localDate, LocalTime.MAX);

            //select sum(amount) from orders where order_time> ? and order_time <? and status=5

            Map map=new HashMap();
            map.put("begin",begintime);
            map.put("end",endtime);
            map.put("status", Orders.COMPLETED);

            Double turnover=orderMapper.sumByMap(map);
            turnover=turnover == null ? 0.0 : turnover;
            doubleList.add(turnover);

        }

        TurnoverReportVO turnoverReportVO = TurnoverReportVO.builder()
                .dateList(StringUtils.join(detelist, ","))
                .turnoverList(StringUtils.join(doubleList,","))
                .build();
        return turnoverReportVO;
    }

    /**
     * 统计指定区间内的营业额
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {

        List<LocalDate> dateList =new ArrayList<>();
        dateList.add(begin);
        while(!begin.equals(end)){
            begin=begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer>newUserList =new ArrayList<>();//存放每天的新增用户数量
        List<Integer>totalUserList =new ArrayList<>();//存放每天的总用户数量

        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate,LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate,LocalTime.MAX);

            Map map=new HashMap();
            map.put("end",endTime);
            Integer totalUser = userMapper.countByMap(map);
            map.put("begin",beginTime);
            Integer newUser = userMapper.countByMap(map);

            totalUserList.add(totalUser);
            newUserList.add(newUser);
        }

        return UserReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalUserList,","))
                .build();
    }

    /**
     * 订单数据统计
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getOrderStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);

        while (!begin.equals(end)){
            begin = begin.plusDays(1);
            dateList.add(begin);
        }

        //每天订单总数集合
        List<Integer> orderCountList = new ArrayList<>();
        //每天有效订单数集合
        List<Integer> validOrderCountList = new ArrayList<>();

        //遍历dateList集合，查询每天的有效订单数和订单总数

        for (LocalDate date : dateList) {
            //查询每天的订单总数
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Integer orderCount = getOrderCount(beginTime, endTime, null);//订单总数
            orderCountList.add(orderCount);

            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            validOrderCountList.add(validOrderCount);

            //查询每天的有效订单数
        }

        //计算时间区间内的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();

        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();

        Double orderCompletionRate=0.0;
        if(totalOrderCount!=0){
            //订单完成率
            orderCompletionRate=validOrderCount.doubleValue()/totalOrderCount;
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .orderCompletionRate(orderCompletionRate)
                .build();
    }

    /**
     * 根据时间区间统计指定状态的订单数量
     * @param beginTime
     * @param endTime
     * @param status
     * @return
     */
    private Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime, Integer status) {
        Map map = new HashMap();
        map.put("status", status);
        map.put("begin",beginTime);
        map.put("end", endTime);
        return orderMapper.countByMap(map);
    }



    /**
     * 销量排名统计
     * @param begin
     * @param end
     * @return
     */
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop10 = orderMapper.getSalesTop10(beginTime, endTime);

        List<String> names = salesTop10.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");
        List<Integer> integerList = salesTop10.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(integerList, ",");

        //封装返回结果数据
        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(numberList)
                .build();
    }

    /**
     * 导出运营数据报表
     * @param response
     */
    public void exportBusinessDate(HttpServletResponse response) {
        //1、查询数据库，获取营业数据--查询最近30天的运营数据
        LocalDate begintime = LocalDate.now().minusDays(30);
        LocalDateTime begin = LocalDateTime.of(begintime, LocalTime.MIN);
        LocalDate endtime = LocalDate.now().minusDays(1);
        LocalDateTime end = LocalDateTime.of(endtime, LocalTime.MAX);

        BusinessDataVO businessDataVO = workspaceService.getBusinessData(begin, end);

        //2、通过poi将数据写入到excel文件当中,将模板传入
        // 获取输入流对象，将输入流对象写入XSS当中，即创建了带模板的excel文件
        InputStream in= this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");


        //基于模板文件进行创建
        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            //填充数据--时间
            XSSFSheet sheet = excel.getSheet("Sheet1");//获取当前的标签页

            //数据填充--时间
            sheet.getRow(1).getCell(1).setCellValue("时间："+begintime+"至"+endtime);

            sheet.getRow(3).getCell(2).setCellValue(businessDataVO.getTurnover());
            sheet.getRow(3).getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            sheet.getRow(3).getCell(6).setCellValue(businessDataVO.getNewUsers());

            sheet.getRow(4).getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            sheet.getRow(4).getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //明细数据
            for (int i=0; i<30;i++){
                LocalDate Date = begintime.plusDays(i);
                BusinessDataVO data = workspaceService.getBusinessData(LocalDateTime.of(Date, LocalTime.MIN), LocalDateTime.of(Date, LocalTime.MAX));
                XSSFRow row = sheet.getRow(7 + i);//获得某一行
                row.getCell(1).setCellValue(Date.toString());
                row.getCell(2).setCellValue(data.getTurnover());
                row.getCell(3).setCellValue(data.getValidOrderCount());
                row.getCell(4).setCellValue(data.getOrderCompletionRate());
                row.getCell(5).setCellValue(data.getUnitPrice());
                row.getCell(6).setCellValue(data.getNewUsers());
            }

            //3、通过输出流将excel文件下载到客服端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}
